公开(公告)号：US07463672B2

公开(公告)日：2008-12-09

申请号：US11082621

申请日：2005-03-16

Applicant: Peter Monsen

Inventor： Peter Monsen

IPC: H04B1/00

CPC classification number: H04B1/7105 ,  H04B1/7107 ,  H04B7/08 ,  H04B2201/70702

Abstract: A radio communication method and system for transmitting multiple-user digital data information in a Code Division Multiple Access (CDMA) format over multipath and mutual-interfering channels to a receiving terminal with diversity antennas and equalization signal processing. At the receiving terminal, diversity antenna signals are grouped into time blocks and replicas are generated of the user-unique CDMA sequence signals for a set of K mutually interfering users. Within each time block the multiuser channel is estimated, equalization parameters are calculated, and decision-feedback equalization is used to produce multiuser estimates associated with a subset λ of the K users. These estimates are deinterleaved and error-correction decoded to recover transmitted digital data information for the subset of λ users. The invention includes embodiments for a CDMA sequence period that is equal to or longer than the transmitted data symbol interval with applications to current CDMA reverse link and forward link standards. Also embodiments for both decision-directed and reference-directed channel estimation are given.

Abstract translation: 一种无线电通信方法和系统，用于通过多路径和互相干扰信道将码分多址（CDMA）格式的多用户数字数据信息发射到具有分集天线和均衡信号处理的接收终端。 在接收终端，分集天线信号被分组成时间块，并且为一组K个相互干扰的用户生成用户唯一的CDMA序列信号的副本。 在每个时间块内，估计多用户信道，计算均衡参数，并且使用判决反馈均衡来产生与K个用户的子集λ相关联的多用户估计。 这些估计被解交织并进行纠错解码，以恢复λ用户子集的发送数字数据信息。 本发明包括对应于当前CDMA反向链路和前向链路标准的CDMA序列周期等于或长于所发射的数据符号间隔的实施例。 给出了决策导向和参考导向信道估计的实施例。

公开(公告)号：US07428261B2

公开(公告)日：2008-09-23

申请号：US10482599

申请日：2003-06-30

Applicant: Diane G. Mills ,  Michael J. Kotrlik ,  Kari M. Karwedsky

Inventor： Diane G. Mills ,  Michael J. Kotrlik ,  Kari M. Karwedsky

IPC: H04B1/00 ,  H03D1/04

CPC classification number: H04B1/7107 ,  H04B1/692 ,  H04B1/7103 ,  H04B1/71075 ,  H04B2201/70702 ,  H04J11/0023 ,  H04L5/026 ,  H04L25/03159 ,  H04L27/2601 ,  H04L2025/03414

Abstract: Interference cancellation techniques for use in a wireless multicarrier communications system where signals from multiple wireless networks might be present and interfering with the detection and demodulation processes are disclosed. Interference cancellation is applied to the interfering network before removing same-system interference. By removing the contribution of all interfering systems' from a receiver's aggregate signal, the receiver is capable of detection and demodulation. Performance can be further improved by including an additional level of interference cancellation within the system of interest to separate the individual user of interest.

Abstract translation: 公开了一种用于在来自多个无线网络的信号可能存在​​并且干扰检测和解调过程的无线多载波通信系统中的干扰消除技术。 在去除同一系统干扰之前，将干扰消除应用于干扰网络。 通过从接收机的聚合信号中消除所有干扰系统的贡献，接收机能够进行检测和解调。 通过在感兴趣的系统内包括额外的干扰消除水平来分离感兴趣的个体用户，可以进一步改善性能。

公开(公告)号：US20080225781A1

公开(公告)日：2008-09-18

申请号：US12047527

申请日：2008-03-13

Applicant: Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

Inventor： Narayan Prasad ,  Xiaodong Wang ,  Mohammad Madihian

IPC: H04Q7/00

CPC classification number: H04L1/208 ,  H04B1/7105 ,  H04B1/71055 ,  H04B1/7107 ,  H04B2201/70702 ,  H04L1/0045 ,  H04L1/0606 ,  H04L1/0656 ,  H04L1/0668

Abstract: A method for decoding in a wireless downlink channel, where all dominant transmitting sources use inner codes from a particular set, including the steps of: estimating a channel matrix seen from each dominant transmitter source in response to a pilot or preamble signal transmitted by each such source; converting each estimated channel matrix into an effective channel matrix responsive to the inner code of the corresponding transmitting source; obtaining the received observations in a linear equivalent form whose output is an equivalent of the received observations and in which the effective channel matrix corresponding to each dominant transmitting source inherits the structure of its inner code; i) determining an order for processing each of the transmitting sources; ii) computing a filter for each transmitting source that will be decoded; iii) demodulating and decoding each transmitting source responsive to the determined order from step i) assuming perfect cancellation of signals of preceding or previously decoded transmitting sources; and iv) re-encoding the decoded message of each transmitting source, except the source decoded last, responsive to the modulation and coding scheme employed by the source and the corresponding effective channel matrix and subtracting it from the received observations in the equivalent linear form.

Abstract translation: 一种用于在无线下行链路信道中进行解码的方法，其中所有主要发送源使用来自特定集合的内部代码，包括以下步骤：响应于由每个这样发送的导频或前导信号，估计从每个主要发射机源看到的信道矩阵 资源; 响应于相应的发射源的内部码，将每个估计的信道矩阵转换成有效信道矩阵; 以等效的线性等价形式获得所接收的观测值，其输出等于所接收的观测值，并且其中对应于每个主要发射源的有效信道矩阵继承其内部码的结构; i）确定处理每个发送源的顺序; ii）计算将被解码的每个发射源的滤波器; iii）响应于来自步骤i）的所确定的顺序对每个发射源进行解调和解码，假设完全消除先前或先前解码的发射源的信号; 以及iv）响应于源采用的调制和编码方案以及对应的有效信道矩阵，并且以等效线性形式从接收到的观察中减去每个发送源的解码消息，除了最后解码的源之外，对每个发送源的解码消息进行重新编码。

公开(公告)号：US07423994B2

公开(公告)日：2008-09-09

申请号：US11097877

申请日：2005-04-01

Applicant: Jing Liu ,  Bijan Tuysserkani ,  Jon James Anderson ,  Kurt William Otte ,  Matthias Brehler

Inventor： Jing Liu ,  Bijan Tuysserkani ,  Jon James Anderson ,  Kurt William Otte ,  Matthias Brehler

IPC: H04Q7/00

CPC classification number: H04B1/70754 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70707

Abstract: Methods and apparatus for searching a list of pilot signals. A method is provided for searching a list of pilot signals in a communication network. The method includes defining a prio list that indicates an order in which the list of pilot signals will be searched, obtaining a search duration, and determining an indicator that identifies a portion of the prio list that can be searched within the search duration. The method also includes performing a search of the portion of the prio list, and updating the list of pilot signals based on the results of the search.

Abstract translation: 用于搜索导频信号列表的方法和装置。 提供了一种用于搜索通信网络中的导频信号的列表的方法。 该方法包括：定义一个列表，其指示将搜索导频信号的列表的顺序，获得搜索持续时间，以及确定标识在搜索持续时间内可被搜索的一部分列表的指示符。 该方法还包括执行对该列表的部分的搜索，以及基于搜索的结果来更新导频信号的列表。

公开(公告)号：US20080137526A1

公开(公告)日：2008-06-12

申请号：US11651237

申请日：2007-01-09

Applicant: Zhucheng Jiang ,  Haitao Wang

Inventor： Zhucheng Jiang ,  Haitao Wang

IPC: H04J11/00

CPC classification number: H04B1/707 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04J13/0048 ,  H04J13/18

Abstract: The pilots of a wireless system are arranged to reduce inter-sector interference by establishing a systematic assignment of pilots across the system. In one embodiment, the pilots are differently coded and directionally positioned within a cell such that the same pilot from adjacent cells do not overlap. In one embodiment, Walsh codes are used to create the differently coded pilot signals.

Abstract translation: 无线系统的飞行员被安排为通过在系统上建立导频的系统分配来减少扇区间干扰。 在一个实施例中，导频被不同地编码并定向地定位在小区内，使得来自相邻小区的相同导频不重叠。 在一个实施例中，沃尔什码用于创建不同编码的导频信号。

公开(公告)号：US07379518B2

公开(公告)日：2008-05-27

申请号：US11257534

申请日：2005-10-25

Applicant: Stephen G. Dick ,  Eldad Zeira

Inventor： Stephen G. Dick ,  Eldad Zeira

IPC: H04L7/00

CPC classification number: H04W56/002 ,  H04B1/7073 ,  H04B7/2668 ,  H04B7/2687 ,  H04B7/269 ,  H04B7/2693 ,  H04B7/2696 ,  H04B2201/70702 ,  H04J3/0641 ,  H04W56/0065 ,  H04W56/0075

Abstract: In a radio network controller (RNC), a covariant matrix and a database are updated. The RNC then detects that a first base station's time-error-variance exceeds a predetermined threshold. In response, the RNC signals to a user-equipment (UE) to measure a time difference of arrival (TDOA) between signals transmitted from the first base station and a reference base station. The UE measures the requested TDOA between the designated base stations and reports the measurement results back to the RNC. The RNC then compares the measured TDOA with a TDOA value stored in the database. Based on the comparison, the RNC signals to the first base station to adjust its time base.

Abstract translation: 在无线网络控制器（RNC）中，更新协变矩阵和数据库。 然后，RNC检测到第一基站的时间误差方差超过预定阈值。 作为响应，RNC向用户设备（UE）发信号，以测量从第一基站和参考基站发送的信号之间的到达时间差（TDOA）。 UE在指定的基站之间测量所请求的TDOA，并将测量结果报告给RNC。 然后，RNC将测量的TDOA与存储在数据库中的TDOA值进行比较。 基于比较，RNC向第一基站发信号调整其时基。

公开(公告)号：US20080117835A1

公开(公告)日：2008-05-22

申请号：US12019596

申请日：2008-01-24

Applicant: Francesco Grilli ,  Charles Wheatley ,  Serge Willenegger ,  Parvathanathan Subrahmanya

Inventor： Francesco Grilli ,  Charles Wheatley ,  Serge Willenegger ,  Parvathanathan Subrahmanya

IPC: G01R31/08

CPC classification number: H04W56/002 ,  H04B7/2668 ,  H04B2201/70702 ,  H04W56/001 ,  H04W56/0015 ,  H04W56/0045 ,  H04W92/20

Abstract: Schemes to time-align transmissions from multiple base stations to a terminal. To achieve time-alignment, differences between the arrival times of transmissions from the base stations, as observed at the terminal, are determined and provided to the system and used to adjust the timing at the base stations such that terminal-specific radio frames arrive at the terminal within a particular time window. In one scheme, a time difference between two base stations is partitioned into a frame-level time difference and a chip-level time difference. Whenever requested to perform and report time difference measurements, the terminal measures the chip-level timing for each candidate base station relative to a reference base station. Additionally, the terminal also measures the frame-level timing and includes this information in the time difference measurement only if required. Otherwise, the terminal sets the frame-level part to a predetermined value (e.g., zero).

公开(公告)号：US20080039141A1

公开(公告)日：2008-02-14

申请号：US11502643

申请日：2006-08-10

Applicant: Holger Claussen ,  Louis Gwyn Samuel

Inventor： Holger Claussen ,  Louis Gwyn Samuel

IPC: H04B1/38 ,  H04M1/00

CPC classification number: H04W72/02 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04J13/10 ,  H04L1/0001 ,  H04W16/10 ,  H04W36/08 ,  H04W48/08 ,  H04W88/08

Abstract: A method is provided of a base station for wireless telecommunications changing scrambling code to be applied to pilot signals for transmission. The method comprises automatically: identifying a need to change scrambling code, selecting a new scrambling code for use, reprogramming the base station to use the scrambling code, and using the new scrambling code for subsequent pilot signal transmissions.

Abstract translation: 提供了一种用于无线电信改变扰码的基站的方法，该扰频码应用于用于传输的导频信号。 所述方法包括：自动识别需要改变扰码，选择新的扰码使用，重新编程基站以使用扰频码，以及使用新的扰频码用于随后的导频信号传输。

公开(公告)号：US07321584B2

公开(公告)日：2008-01-22

申请号：US10256935

申请日：2002-09-27

Applicant: Yu-Ro Lee ,  Dong-Seung Kwon

Inventor： Yu-Ro Lee ,  Dong-Seung Kwon

IPC: H04J3/06

CPC classification number: H04B1/7077 ,  H04B1/7083 ,  H04B2201/70702

Abstract: A cell search system for a mobile station in a time division duplex system includes: a primary synchronization code search module for searching primary synchronization codes and comparing frame values of the primary synchronization codes to determine a position of the maximum value; a correlation module for estimating a phase value and acquiring a first correlation value; a secondary synchronization code search module for generating determinative variables and storing them based on the position of the maximum value; a comparison and decision module for detecting a maximum value of the determinative variables, comparing it with the values stored in the secondary synchronization code search module to count matching values, and comparing the count value with a system value to decide whether slot synchronization and group acquisition is successful; and a base station determination module for determining a second correlation value between midamble codes and the received signals, and selecting a maximum value of it to determine a base station.

Abstract translation: 用于时分双工系统中的移动台的小区搜索系统包括：主同步码搜索模块，用于搜索主同步码并比较主同步码的帧值以确定最大值的位置; 相关模块，用于估计相位值并获得第一相关值; 第二同步码搜索模块，用于根据最大值的位置产生确定性变量并存储它们; 用于检测决定性变量的最大值的比较和决定模块，将其与存储在次同步码搜索模块中的值进行比较以对匹配值进行计数，并将计数值与系统值进行比较，以确定时隙同步和组获取 成功了 以及基站确定模块，用于确定中间码和接收信号之间的第二相关值，并选择其最大值以确定基站。

公开(公告)号：US07295531B2

公开(公告)日：2007-11-13

申请号：US09841893

申请日：2001-04-25

Applicant: Charles E. Wheatley, III ,  Edward G. Tiedemann, Jr.

Inventor： Charles E. Wheatley, III ,  Edward G. Tiedemann, Jr.

IPC: H04Q7/00 ,  H04Q7/24 ,  H04J3/06

CPC classification number: H04B7/2687 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/7077 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04J3/0682 ,  H04J13/00

Abstract: In the present invention, the slave base station attains synchronization with the reference base station through messages transmitted from and received by a mobile station either in the soft handoff region between the reference base station and the slave base station or within a range which allows the mobile station to communicate with the slave base station. When the mobile station is not in communication with both the reference base station and the slave base station, then the round trip delay between the mobile station and the reference base station is measured by the reference base station. The reference base station communicates the PN code used by the mobile station over the reverse link to the slave base station. The slave base station acquires the signal from the mobile station and determines when the signal from the mobile station arrives. The slave base station then makes and estimate as to the length of the delay between transmission of a signal from the mobile station to the slave base station. Based upon these measurements and estimates, the slave base station determines the error which is present in the slave base station system time.

Abstract translation: 在本发明中，从基站通过在参考基站和从基站之间的软切换区域内或在允许移动台的范围内由移动站发送和接收的消息与基准基站实现同步 站与从站基站进行通信。 当移动台不与参考基站和从基站进行通信时，由参考基站测量移动台与参考基站之间的往返延迟。 参考基站通过反向链路将由移动站使用的PN码传送到从基站。 从基站从移动台获取信号，并确定何时来自移动台的信号到达。 然后，从基站对从移动台到从基站的信号的发送之间的延迟的长度进行估计。 基于这些测量和估计，从基站确定从基站系统时间中存在的错误。